Add usage in readme
Add usage in readme

tobegit3hub/dockerized-openoffice,tobegit3hub/dockerized-openoffice,bjwolf/dockerized-openoffice,bjwolf/dockerized-openoffice,bjwolf/dockerized-openoffice,bjwolf/dockerized-openoffice,bjwolf/dockerized-openoffice,tobegit3hub/dockerized-openoffice,tobegit3hub/dockerized-openoffice